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(parent: babaa9d) | patch
Implement C++17 [[nodiscard]] attribute.
authorJason Merrill <jason@redhat.com>
Thu, 28 Apr 2016 19:01:19 +0000 (15:01 -0400)
committerJason Merrill <jason@gcc.gnu.org>
Thu, 28 Apr 2016 19:01:19 +0000 (15:01 -0400)
commitb632761d2c6a6575a3d4f1b3a03dd1701bf1a087
tree0f443efe47d371ec7fe124b59afcaef0d9fe8d67tree
parentbabaa9df0279b16243acc58c9a5d7731f4882af4commit | diff
Implement C++17 [[nodiscard]] attribute.

PR c++/38172
PR c++/54379
gcc/c-family/
* c-lex.c (c_common_has_attribute): Handle nodiscard.
gcc/cp/
* parser.c (cp_parser_std_attribute): Handle [[nodiscard]].
* tree.c (handle_nodiscard_attribute): New.
(cxx_attribute_table): Add [[nodiscard]].
* cvt.c (cp_get_fndecl_from_callee, cp_get_callee_fndecl): New.
(maybe_warn_nodiscard): New.
(convert_to_void): Call it.

From-SVN: r235597
14 files changed:
gcc/c-family/ChangeLog diff | blob | history
gcc/c-family/c-lex.c diff | blob | history
gcc/cp/ChangeLog diff | blob | history
gcc/cp/cp-tree.h diff | blob | history
gcc/cp/cvt.c diff | blob | history
gcc/cp/tree.c diff | blob | history
gcc/testsuite/c-c++-common/attr-warn-unused-result.c [new file with mode: 0644] blob
gcc/testsuite/g++.dg/cpp1z/feat-cxx1z.C diff | blob | history
gcc/testsuite/g++.dg/cpp1z/nodiscard1.C [new file with mode: 0644] blob
gcc/testsuite/g++.dg/cpp1z/nodiscard2.C [new file with mode: 0644] blob
gcc/testsuite/g++.dg/cpp1z/nodiscard3.C [new file with mode: 0644] blob
gcc/testsuite/g++.dg/warn/Wunused-result-2.C [new file with mode: 0644] blob
gcc/testsuite/g++.dg/warn/unused-result1.C diff | blob | history
gcc/testsuite/gcc.dg/attr-warn-unused-result.c [deleted file] blob | history